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A079826 Consider the triangle shown below; sequence contains the concatenation of numbers read at a 45-degree angle upwards with horizontal beginning with the first term of a row. 3
1, 3, 42, 105, 1196, 21128, 2220137, 36231914, 3735241815, 5538342517, 565439332616, 785753403227, 79775852413128, 105807659514230, 106104817560504329, 1361071038274614944 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
1
3 2
4 5 6
10 9 8 7
11 12 13 14 15
21 20 19 18 17 16
22 23 24 25 26 27 28
36 35 34 33 32 31 30 29
37 38 39 40 41 42 43 44 45
55 54 53 52 51 50 49 48 47 46
56 57 58 59 60 61 62 63 64 65 66
LINKS
MAPLE
read("transforms") ;
A079826 := proc(n)
local L, k;
L := [] ;
for k from 1 to (n+1)/2 do
L := [op(L), A056011(n-k+1, k)] ;
end do:
digcatL(L) ;
end proc: # R. J. Mathar, Sep 05 2012
CROSSREFS
Sequence in context: A249046 A237661 A116006 * A112291 A063040 A365594
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Feb 11 2003
EXTENSIONS
More terms from Jonathan R. Love (japanada11(AT)yahoo.ca), Mar 08 2007
Corrected by Kevin Ryde, Aug 23 2012
STATUS
approved

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Last modified May 27 02:41 EDT 2024. Contains 372847 sequences. (Running on oeis4.)