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.

1, 3, 42, 105, 1196, 21128, 2220137, 36231914, 3735241815, 5538342517, 565439332616, 785753403227, 79775852413128, 105807659514230, 106104817560504329, 1361071038274614944

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

Table of n, a(n) for n=1..16.

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

Cf. A079825, A056011.

Sequence in context: A249046 A237661 A116006 * A112291 A063040 A365594

Adjacent sequences: A079823 A079824 A079825 * A079827 A079828 A079829

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