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!)
 A340495 Records in first differences of A340494. 3
 2, 3, 8, 33, 138, 563, 2268, 9093, 36398, 145623, 582528, 2330153, 9320658, 37282683, 149130788, 596523213, 2386092918, 9544371743, 38177487048, 152709948273, 610839793178, 2443359172803 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Rémy Sigrist, C program for A340495 FORMULA The sequence a(n)-4*a(n-1) appears to be -5, -4, 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, ... which is essentially 5*k+1 (k >= -1). The sequence itself appears to have g.f. =      x*(2*x-1)*(2*x^2+5*x-2)/((1-x)^2*(1-4*x)). PROG (C) See Links section. CROSSREFS Cf. A340488, A340494. Sequence in context: A162074 A162052 A082569 * A084908 A078742 A005370 Adjacent sequences:  A340492 A340493 A340494 * A340496 A340497 A340498 KEYWORD nonn,more AUTHOR Rémy Sigrist and N. J. A. Sloane, Jan 10 2021 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 June 20 04:43 EDT 2021. Contains 345157 sequences. (Running on oeis4.)