A344530 - OEIS

A344530

For any number n with binary expansion Sum_{k = 1..m} 2^e_k (where 0 <= e_1 < ... < e_m), a(n) = Product_{k = 1..m} prime(1+e_k)^k (where prime(k) denotes the k-th prime number).

1, 2, 3, 18, 5, 50, 75, 2250, 7, 98, 147, 6174, 245, 17150, 25725, 5402250, 11, 242, 363, 23958, 605, 66550, 99825, 32942250, 847, 130438, 195657, 90393534, 326095, 251093150, 376639725, 870037764750, 13, 338, 507, 39546, 845, 109850, 164775, 64262250, 1183

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OFFSET

0,2

COMMENTS

All terms are distinct and belong to A304678.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..8192

FORMULA

a(0) = 1.

a(2*n) = A003961(a(n)).

a(2*n + 1) = A045967(a(n)).

a(2^n) = prime(n+1) for any n >= 0.