The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A254100 Postludic numbers: Second column of Ludic array A255127. 15
 4, 9, 19, 31, 55, 73, 101, 145, 167, 205, 253, 293, 317, 355, 413, 473, 521, 569, 623, 677, 737, 763, 833, 917, 983, 1027, 1051, 1121, 1171, 1273, 1337, 1411, 1471, 1571, 1619, 1663, 1681, 1807, 1957, 1991, 2087, 2113, 2171, 2245, 2275, 2335, 2401, 2497, 2593, 2713, 2771, 2831, 2977, 3047, 3113 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Antti Karttunen, Table of n, a(n) for n = 1..10001 FORMULA a(n) = A255407(A001248(n)). MATHEMATICA rows = 100; cols = 2; t = Range[2, 10^4]; r = {1}; n = 1; While[n <= rows, k = First[t]; AppendTo[r, k]; t0 = t; t = Drop[t, {1, -1, k}]; ro[n++] = Complement[t0, t][[1 ;; cols]]]; A = Array[ro, rows]; Table[A[[n, 2]], {n, 1, rows} ] (* Jean-François Alcover, Mar 14 2016, after Ray Chandler *) PROG (Scheme) (define (A254100 n) (A255127bi n 2)) ;; A255127bi given in A255127. CROSSREFS Column 2 of A255127. (Row 2 of A255129). Positions of 2's in A260739. Subsequence of A192607, A302036 and A302038. Cf. A276576, A276606 (first differences). Cf. also A001248, A219178. Sequence in context: A180784 A015618 A086733 * A008239 A038403 A009856 Adjacent sequences:  A254097 A254098 A254099 * A254101 A254102 A254103 KEYWORD nonn AUTHOR Antti Karttunen, Feb 22 2015 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 25 05:52 EDT 2020. Contains 337335 sequences. (Running on oeis4.)