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Search: id:A104675
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| 6, 14, 24, 36, 50, 66, 84, 104, 126, 150, 176, 204, 234, 266, 300, 336, 374, 414, 456, 500, 546, 594, 644, 696, 750, 806, 864, 924, 986, 1050, 1116, 1184, 1254, 1326, 1400, 1476, 1554
(list; graph; listen)
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OFFSET
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0,1
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FORMULA
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a(n) = (n+1)(n+6) = A028557(n+1) . - R. J. Mathar (mathar(AT).strw.leidenuniv.nl), May 19 2008
a(n)=2*n+a(n-1)+4 (with a(1)=6) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 08 2009]
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EXAMPLE
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If n=0 then C(0+1,0+0)*C(0+6,1)= C(1,0)*C(6,1)=1*6=6
If n=5 then C(5+1,5+0)*C(5+6,1)= C(6,5)*C(11,1)=6*11=66
For n=2, a(2)=2*2+6+4=14; n=3, a(3)=2*3+14+4=24; n=4, a(4)=2*4+24+4=36 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 08 2009]
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MAPLE
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with (combinat):seq(fibonacci(3, n)+n-7, n=3..40); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 07 2008
with(finance):seq(add(cashflows([2, k, k], 0 ), k=2..n), n=2..38); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 22 2008
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CROSSREFS
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Cf. A062190.
Cf. A002522.
Sequence in context: A005281 A120345 A107400 this_sequence A028557 A083657 A010740
Adjacent sequences: A104672 A104673 A104674 this_sequence A104676 A104677 A104678
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KEYWORD
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easy,nonn
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AUTHOR
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Zerinvary Lajos (zlaja(AT)freemail.hu), Apr 22 2005
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