Triangle read by rows: order of all-2s configuration on the n X k sandpile grid graph.

Terms

a(0) =2a(1) =3a(2) =1a(3) =7a(4) =7a(5) =8a(6) =11a(7) =5a(8) =71a(9) =3a(10) =26a(11) =9a(12) =679a(13) =77a(14) =52a(15) =41a(16) =13a(17) =769a(18) =281a(19) =17753a(20) =29a(21) =97a(22) =47a(23) =3713a(24) =4271a(25) =726433a(26) =434657a(27) =272a(28) =153a(29) =17