%I A151542
%S A151542 0,12,27,45,66,90,117,147,180,216,255,297,342,390,441,495,552,612,675,
               741,
%T A151542 810,882,957,1035,1116,1200,1287,1377,1470,1566,1665,1767,1872,1980,2091,
%U A151542 2205,2322,2442,2565,2691,2820,2952,3087,3225,3366,3510,3657,3807,3960
%N A151542 Generalized pentagonal numbers 12n+3n(n-1)/2.
%F A151542 a(n)=3*n+a(n-1)+6 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Nov 08 2009]
%e A151542 For n=2, a(2)=3*2+0+6=12; n=3, a(3)=3*3+12+6=27; n=4, a(4)=3*4+27+6=45 
               [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 08 2009]
%Y A151542 The generalized pentagonal numbers b*n+3*n*(n-1)/2, for b = 1 through 
               12, form sequences A000326, A005449, A045943, A115067, A140090, A140091, 
               A059845, A140672, A140673, A140674, A140675, A151542.
%Y A151542 Sequence in context: A030736 A003346 A047723 this_sequence A069550 A079705 
               A068721
%Y A151542 Adjacent sequences: A151539 A151540 A151541 this_sequence A151543 A151544 
               A151545
%K A151542 nonn
%O A151542 0,2
%A A151542 N. J. A. Sloane (njas(AT)research.att.com), May 15 2009