A276528 Least number with same prime signature as sigma(n), the sum of the divisors of n: a(n) = A046523(A000203(n)).

1, 2, 4, 2, 6, 12, 8, 6, 2, 12, 12, 12, 6, 24, 24, 2, 12, 6, 12, 30, 32, 36, 24, 60, 2, 30, 24, 24, 30, 72, 32, 12, 48, 24, 48, 6, 6, 60, 24, 60, 30, 96, 12, 60, 30, 72, 48, 12, 6, 6, 72, 12, 24, 120, 72, 120, 48, 60, 60, 120, 6, 96, 24, 2, 60, 144, 12, 60, 96, 144, 72, 30, 6, 30, 12, 60, 96, 120, 48, 30, 4

Offset

1,2

Links

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

Formula

a(n) = A046523(A000203(n)).

Prog

(Scheme) (define (A276528 n) (A046523 (A000203 n)))

Crossrefs

Cf. A000203, A046523, A277906.

Sequence in context: A199943 A335340 A013599 * A205839 A138024 A167656

Adjacent sequences: A276525 A276526 A276527 * A276529 A276530 A276531

Keyword

nonn

Author

Antti Karttunen, Nov 17 2016

Status

approved