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A260440
Unlucky numbers removed at the stage four of Lucky sieve.
3
27, 57, 91, 121, 153, 183, 217, 247, 279, 309, 343, 373, 405, 435, 469, 499, 531, 561, 595, 625, 657, 687, 721, 751, 783, 813, 847, 877, 909, 939, 973, 1003, 1035, 1065, 1099, 1129, 1161, 1191, 1225, 1255, 1287, 1317, 1351, 1381, 1413, 1443, 1477, 1507, 1539, 1569, 1603, 1633, 1665, 1695, 1729, 1759, 1791, 1821, 1855, 1885, 1917, 1947, 1981, 2011
OFFSET
1,1
COMMENTS
Numbers congruent to {27, 57, 91, 121} modulo 126. - Jianing Song, Apr 27 2022
FORMULA
a(n) = A258011(9*n).
a(n) = A260436(A255414(1+n)).
From Jianing Song, Apr 27 2022: (Start)
a(n) = a(n-4) + 126.
a(n) = a(n-1) + a(n-4) - a(n-5).
G.f.: (27*x+30*x^2+34*x^3+30*x^4+5*x^5)/(1-x-x^4+x^5).
E.g.f: 1/2*(10 + cos(x) - sin(x) + (63*x-11)*cosh(x) + (63*x-8)*sinh(x)). (End)
PROG
(Scheme, two alternatives)
(define (A260440 n) (A258011 (* 9 n)))
(define (A260440 n) (A255543bi 4 n)) ;; Code for A255543bi given in A255543.
CROSSREFS
Row 4 of A255543. Every ninth term of A258011.
Sequence in context: A352266 A053180 A080864 * A039459 A235164 A157500
KEYWORD
nonn,easy
AUTHOR
Antti Karttunen, Jul 27 2015
STATUS
approved