The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A211072

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A211072

Sum of numbers with no '0' decimal digits whose sum of digits equals n.
(history; published version)

#42 by Alois P. Heinz at Tue Jul 06 15:59:35 EDT 2021

STATUS

proposed

approved

#41 by Alois P. Heinz at Tue Jul 06 09:13:14 EDT 2021

STATUS

editing

proposed

#40 by Alois P. Heinz at Tue Jul 06 09:11:13 EDT 2021

FORMULA

G.f.: (x + 2*(9*x^2 8 + 38*x^3 7 + 47*x^4 6 + 56*x^5 + 65*x^6 4 + 74*x^7 3 + 83*x^8 2 + 92*x^9)/( + 1 - 11*)/((x - ^9 + x^2 8 + 9*x^3 7 + 19*x^4 6 + 29*x^5 + 39*x^6 4 + 49*x^7 3 + 59*x^8 2 + 69x - 1)*(10*x^9 + 90*x^10 + 80*x^11 8 + 7010*x^12 7 + 6010*x^13 6 + 5010*x^14 5 + 4010*x^15 4 + 3010*x^16 3 + 2010*x^17 2 + 10*x^18 - 1)). - Yurii Ivanov, Jul 06 2021

Discussion

Tue Jul 06

09:11

Alois P. Heinz: ... and more space efficient ...

#39 by Alois P. Heinz at Tue Jul 06 09:09:39 EDT 2021

STATUS

proposed

editing

#38 by Michel Marcus at Tue Jul 06 04:38:35 EDT 2021

STATUS

editing

proposed

Discussion

Tue Jul 06

05:39

Kevin Ryde: I dithered whether it was a bit on the big side or not :).

09:09

Alois P. Heinz: The g.f. should be given in factored form ... which is much more instructive ...

#37 by Michel Marcus at Tue Jul 06 04:38:06 EDT 2021

LINKS

<a href="/index/Rec#order_18">Index entries for linear recurrences with constant coefficients</a>, signature (11, 1, -9, -19, -29, -39, -49, -59, -69, -90, -80, -70, -60, -50, -40, -30, -20, -10).

STATUS

proposed

editing

Discussion

Tue Jul 06

04:38

Michel Marcus: to avoid line wrapping on recurrence signature

#36 by Kevin Ryde at Tue Jul 06 04:32:16 EDT 2021

STATUS

editing

proposed

#35 by Kevin Ryde at Tue Jul 06 04:31:50 EDT 2021

KEYWORD

nonn,base,easy,changed

STATUS

proposed

editing

#34 by Kevin Ryde at Tue Jul 06 04:31:13 EDT 2021

STATUS

editing

proposed

#33 by Kevin Ryde at Tue Jul 06 04:30:42 EDT 2021

LINKS

<a href="/index/Rec#order_18">Index entries for linear recurrences with constant coefficients</a>, signature (11, 1, -9, -19, -29, -39, -49, -59, -69, -90, -80, -70, -60, -50, -40, -30, -20, -10).

STATUS

proposed

editing