A278221 Filtering sequence (related to prime factorization): a(n) = A046523(A122111(n)).

1, 2, 4, 2, 8, 6, 16, 2, 4, 12, 32, 6, 64, 24, 12, 2, 128, 6, 256, 12, 36, 48, 512, 6, 8, 96, 4, 24, 1024, 30, 2048, 2, 72, 192, 24, 6, 4096, 384, 144, 12, 8192, 60, 16384, 48, 12, 768, 32768, 6, 16, 12, 288, 96, 65536, 6, 72, 24, 576, 1536, 131072, 30, 262144, 3072, 36, 2, 216, 120, 524288, 192, 1152, 60, 1048576, 6, 2097152, 6144, 12, 384, 48, 240, 4194304, 12, 4

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..2048

Formula

a(n) = A046523(A122111(n)).

Prog

(Scheme) (define (A278221 n) (A046523 (A122111 n)))

Crossrefs

Cf. A046523, A122111.

Cf. also A278220.

Sequence in context: A113477 A345298 A279350 * A287879 A336093 A304213

Adjacent sequences: A278218 A278219 A278220 * A278222 A278223 A278224

Keyword

nonn

Author

Antti Karttunen, Nov 16 2016

Status

approved