

A111711


Leading column of triangle mentioned in A111710.


4



1, 2, 5, 8, 14, 19, 28, 35, 47, 56, 71, 82, 100, 113, 134, 149, 173, 190, 217, 236, 266, 287, 320, 343, 379, 404, 443, 470, 512, 541, 586, 617, 665, 698, 749, 784, 838, 875, 932, 971, 1031, 1072, 1135, 1178, 1244, 1289, 1358, 1405, 1477, 1526, 1601, 1652
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

Also partial sums of A257143.  Reinhard Zumkeller, Apr 17 2015


LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000


FORMULA

a(1)=1, a(2n) = a(2n1)+2n1, a(2n+1)=a(2n)+3n; a(n) = A117110(n1)+1.  Franklin T. AdamsWatters, May 01 2006


PROG

(Haskell)
a111711 n = a111711_list !! (n1)
a111711_list = 1 : zipWith (+) a111711_list a080512_list
 Reinhard Zumkeller, Apr 17 2015


CROSSREFS

Cf. A111710, A111712, A080512, A257143.
Sequence in context: A190105 A295400 A266287 * A095348 A215725 A022907
Adjacent sequences: A111708 A111709 A111710 * A111712 A111713 A111714


KEYWORD

easy,nonn


AUTHOR

Amarnath Murthy, Aug 24 2005


EXTENSIONS

More terms from Franklin T. AdamsWatters, May 01 2006


STATUS

approved



