The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A098012

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A098012

Triangle read by rows in which the k-th term in row n (n >= 1, k = 1..n) is Product_{i=0..k-1} prime(n-i).
(history; published version)

#22 by Alois P. Heinz at Sat Mar 16 12:09:46 EDT 2019

STATUS

editing

approved

#21 by Alois P. Heinz at Sat Mar 16 12:09:44 EDT 2019

DATA

2, 3, 6, 5, 15, 30, 7, 35, 105, 210, 11, 77, 385, 1155, 2310, 13, 143, 1001, 5005, 15015, 30030, 17, 221, 2431, 17017, 85085, 255255, 510510, 19, 323, 4199, 46189, 323323, 1616615, 4849845, 9699690, 23, 437, 7429, 96577, 1062347, 7436429, 37182145, 111546435, 223092870

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approved

editing

#20 by Alois P. Heinz at Sat Mar 16 12:08:28 EDT 2019

STATUS

proposed

approved

#19 by Muniru A Asiru at Sat Mar 16 05:25:44 EDT 2019

STATUS

editing

proposed

#18 by Muniru A Asiru at Sat Mar 16 05:25:37 EDT 2019

MAPLE

T:=(n, k)->mul(ithprime(n-i), i=0..k-1): seq(seq(T(n, k), k=1..n), n=1..9); # Muniru A Asiru, Mar 16 2019

PROG

(GAP) P:=Filtered([1..200], IsPrime);;

T:=Flat(List([1..9], n->List([1..n], k->Product([0..k-1], i->P[n-i])))); # Muniru A Asiru, Mar 16 2019

STATUS

approved

editing

#17 by M. F. Hasler at Thu May 04 08:50:20 EDT 2017

STATUS

editing

approved

#16 by M. F. Hasler at Thu May 04 08:50:07 EDT 2017

COMMENTS

Also, square array A(m,n) in which row m lists all products of m consecutive primes (read by falling antidiagonals). See also A248164. - M. F. Hasler, May 03 2017

EXAMPLE

Or, as a an infinite square array:

STATUS

approved

editing

#15 by Bruno Berselli at Wed May 03 11:33:57 EDT 2017

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reviewed

approved

#14 by Joerg Arndt at Wed May 03 11:14:11 EDT 2017

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proposed

reviewed

#13 by M. F. Hasler at Wed May 03 10:53:28 EDT 2017

STATUS

editing

proposed