A278264 Least number with the same prime signature as the n-th term in the inverse of EKG-sequence: a(n) = A046523(A064664(n)).

1, 2, 2, 2, 6, 4, 6, 8, 6, 4, 12, 2, 12, 2, 2, 2, 6, 12, 2, 12, 6, 2, 2, 16, 24, 8, 6, 6, 6, 2, 2, 2, 6, 32, 4, 30, 2, 36, 2, 24, 6, 6, 16, 2, 6, 30, 2, 12, 12, 6, 6, 2, 36, 48, 2, 4, 6, 24, 2, 12, 6, 60, 6, 64, 24, 2, 128, 6, 12, 6, 6, 12, 30, 30, 6, 2, 30, 30, 2, 72, 12, 2, 96, 6, 60, 48, 6, 2, 2, 2, 6, 6, 6, 24, 6, 6, 30, 12, 96, 6, 24, 6, 2, 6, 2, 12, 6

Offset

1,2

Comments

This sequence works as a "sentinel" for the inverse of EKG-sequence by matching to any other sequence that is obtained as f(A064664(n)), where f(n) is any function that depends only on the prime signature of n (see the index entry for "sequences computed from exponents in ..."). As of Nov 11 2016 no such sequences were present in the database.

Terms and b-file computed from b-file of A064664 provided by T. D. Noe and Ray Chandler.

Links

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

Index entries for sequences computed from exponents in factorization of n

Formula

a(n) = A046523(A064664(n)).

Prog

(Scheme) (define (A278264 n) (A046523 (A064664 n)))

Crossrefs

Cf. A046523, A064664, A278263.

Sequence in context: A379010 A099259 A131904 * A232114 A038074 A059885

Adjacent sequences: A278261 A278262 A278263 * A278265 A278266 A278267

Keyword

nonn

Author

Antti Karttunen, Nov 16 2016

Status

approved