The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A255550

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A255550

Main diagonal of array A255551.
(history; published version)

#6 by N. J. A. Sloane at Sat Feb 28 14:49:04 EST 2015

STATUS

proposed

approved

#5 by Antti Karttunen at Thu Feb 26 14:47:07 EST 2015

STATUS

editing

proposed

#4 by Antti Karttunen at Thu Feb 26 14:33:38 EST 2015

COMMENTS

Equally, 2 followed by the submain diagonal first subdiagonal of A255543.

#3 by Antti Karttunen at Thu Feb 26 12:31:02 EST 2015

FORMULA

Other identities.

For all n >= 1, a(n) = A255553(A083141(n)).

CROSSREFS

Cf. also A083141, A255410, A255553.

#2 by Antti Karttunen at Thu Feb 26 12:22:52 EST 2015

NAME

allocated for Antti KarttunenMain diagonal of array A255551.

DATA

2, 5, 39, 91, 199, 315, 567, 829, 1227, 1513, 1953, 2569, 3277, 3769, 5119, 5925, 6607, 7539, 8319, 9375, 11007, 12511, 14103, 15801, 17593, 19165, 22213, 23617, 25467, 26967, 29347, 32733, 35809, 38085, 40953, 42915, 49093, 51787, 54055, 57459, 60409, 64057, 68433, 71637, 76299, 79719, 82545, 86133, 94921, 98037, 102745

OFFSET

1,1

COMMENTS

Equally, 2 followed by the submain diagonal of A255543.

FORMULA

a(n) = A255551(n,n).

a(1) = 2; for n > 1: a(n) = A255543(n,n-1).

PROG

(Scheme, two variants)

(define (A255550 n) (if (= 1 n) 2 (A255543bi n (- n 1)))) ;; A255543bi is given in A255543.

(define (A255550v2 n) (A255551bi n n)) ;; A255551bi is given in A255551.

CROSSREFS

Cf. A255543, A255551, A255549.

KEYWORD

allocated

nonn

AUTHOR

Antti Karttunen, Feb 26 2015

STATUS

approved

editing

#1 by Antti Karttunen at Wed Feb 25 06:19:36 EST 2015

NAME

allocated for Antti Karttunen

KEYWORD

allocated

STATUS

approved