A256488 a(n) = A256487(n)/2 = (A254100(n) - A219178(n))/2.

1, 2, 0, 2, 5, 9, 8, 18, 14, 24, 39, 40, 31, 45, 38, 55, 67, 79, 100, 110, 112, 108, 118, 140, 154, 156, 131, 157, 164, 201, 215, 212, 219, 244, 253, 269, 207, 255, 321, 310, 340, 324, 328, 345, 333, 342, 365, 395, 371, 420, 422, 431, 458, 488, 502, 546, 536, 556, 527, 583, 588, 592, 646, 643, 639, 665, 688, 662, 662

Offset: 1

Author

Antti Karttunen, May 01 2015

Keywords

• nonn

Comments

Half the difference between the least nonludic number removed at the n-th stage of Ludic sieve and the least unlucky number removed at the n-th stage of Lucky sieve.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..933

Crossrefs

Cf. A219178, A254100, A256482, A256486, A256487.

Programs

Scheme

(define (A256488 n) (/ (A256487 n) 2))

Formula

a(n) = A256487(n)/2 = (A254100(n) - A219178(n))/2.