A278256 Least number with the same prime signature as the n-th oblong number (A002378).

2, 6, 12, 12, 30, 30, 24, 72, 60, 30, 60, 60, 30, 210, 240, 48, 60, 60, 60, 420, 210, 30, 120, 360, 60, 120, 360, 60, 210, 210, 96, 480, 210, 210, 1260, 180, 30, 210, 840, 120, 210, 210, 60, 1260, 420, 30, 240, 720, 180, 420, 420, 60, 120, 840, 840, 840, 210, 30, 420, 420, 30, 420, 2880, 960, 2310, 210, 60, 420, 2310, 210, 360, 360, 30, 420, 1260, 420, 2310

Offset

1,1

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Formula

a(n) = A046523(A002378(n)).

a(n) = A278259((2*n) + 1).

Prog

(Scheme) (define (A278256 n) (A046523 (A002378 n)))

Crossrefs

Odd bisection of A278259.

Cf. A002378, A046523.

Cf. also A278253.

Sequence in context: A092427 A058198 A096075 * A066791 A062723 A152667

Adjacent sequences: A278253 A278254 A278255 * A278257 A278258 A278259

Keyword

nonn

Author

Antti Karttunen, Nov 22 2016

Status

approved