A165479 a(n) = Least i in range [A165478(n),A165478(n+1)] for which abs(A165477(i)) gets the maximum value in that range.

43690, 131070, 174761, 262141, 305832, 393212, 436903, 524283, 567974, 655354, 699045, 786425, 830116, 917496, 961187, 1048567, 1092258, 1179638, 1223329, 1310709, 1354400, 1441780, 1485471, 1572851, 1616542, 1703922

Offset

0,1

Comments

The corresponding maximum values are 570,0,570,0,570,0,570,0,570,0,570,0,570,0,570,0,570,0,... (period 2 sequence). Note that also A165477(87380) = 570 (as 131071 is 4k+3 prime), and A165477(65535) = 285 = 570/2.

Links

Table of n, a(n) for n=0..25.

Formula

a(n) = floor(n/2)*131071 + (1+2*(n modulo 2))*43690

Prog

(MIT Scheme:) (define (A165479 n) (+ (* (floor->exact (/ n 2)) 131071) (* (+ 1 (* 2 (modulo n 2))) 43690)))

Crossrefs

Sequence in context: A251995 A094493 A342580 * A140931 A295440 A045157

Adjacent sequences: A165476 A165477 A165478 * A165480 A165481 A165482

Keyword

nonn

Author

Antti Karttunen, Sep 21 2009

Status

approved