A328071 Difference triangle for A327460 read by upwards antidiagonals.

1, 2, 3, 4, 6, 9, -14, -10, -4, 5, 35, 21, 11, 7, 12, -76, -41, -20, -9, -2, 10, 161, 85, 44, 24, 15, 13, 23, -357, -196, -111, -67, -43, -28, -15, 8, 831, 474, 278, 167, 100, 57, 29, 14, 22, -1955, -1124, -650, -372, -205, -105, -48, -19, -5, 17, 4508, 2553

Offset

1,2

Comments

By definition, all terms are distinct.

Conjecture: every positive number appears. (Probably false, see next comment. - N. J. A. Sloane, Oct 09 2019)

239, 776, 2470, and 7805 are the smallest numbers that do not appear in the first 10^4, 10^5, 10^6, and 10^7 terms respectively. - Peter Kagey, Oct 05 2019. (In other words, 239, 776, 2470, and 7805 probably will never appear. - N. J. A. Sloane, Oct 09 2019)

Links

Peter Kagey, Table of n, a(n) for n = 1..10011 (first 141 antidiagonals, flattened)

Example

The difference triangle for A327460 begins:
     1,    3,    9,   5,  12,  10,  23, 8, ...
     2,    6,   -4,   7,  -2,  13, -15, ...
     4,  -10,   11,  -9,  15, -28, ...
   -14,   21,  -20,  24, -43, ...
    35,  -41,   44, -67, ...
   -76,   85, -111, ...
   161, -196, ...
  -357, ...
...
Read this by upwards antidiagonals.

Crossrefs

Has the same relation to A327460 as A235539 does to A239538.

Sequence in context: A352039 A318728 A220126 * A039884 A240496 A212464

Adjacent sequences: A328068 A328069 A328070 * A328072 A328073 A328074

Keyword

sign,tabl

Author

N. J. A. Sloane, Oct 05 2019

Extensions

Terms a(29) and beyond from Peter Kagey, Oct 05 2019

Status

approved